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50 lines
1.2 KiB
50 lines
1.2 KiB
use crate::{fq::Fq, fr::Fr};
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use ark_ec::{
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models::CurveConfig,
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short_weierstrass::{self as sw, SWCurveConfig},
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};
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use ark_ff::{Field, MontFp, Zero};
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#[cfg(test)]
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mod tests;
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#[derive(Copy, Clone, Default, PartialEq, Eq)]
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pub struct VestaConfig;
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impl CurveConfig for VestaConfig {
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type BaseField = Fq;
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type ScalarField = Fr;
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/// COFACTOR = 1
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const COFACTOR: &'static [u64] = &[0x1];
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/// COFACTOR_INV = 1
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const COFACTOR_INV: Fr = Fr::ONE;
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}
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pub type Affine = sw::Affine<VestaConfig>;
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pub type Projective = sw::Projective<VestaConfig>;
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impl SWCurveConfig for VestaConfig {
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/// COEFF_A = 0
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const COEFF_A: Fq = Fq::ZERO;
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/// COEFF_B = 5
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const COEFF_B: Fq = MontFp!("5");
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/// AFFINE_GENERATOR_COEFFS = (G1_GENERATOR_X, G1_GENERATOR_Y)
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const GENERATOR: Affine = Affine::new_unchecked(G_GENERATOR_X, G_GENERATOR_Y);
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#[inline(always)]
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fn mul_by_a(_: Self::BaseField) -> Self::BaseField {
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Self::BaseField::zero()
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}
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}
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/// G_GENERATOR_X = -1
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/// Encoded in Montgomery form, so the value here is -R mod p.
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pub const G_GENERATOR_X: Fq = MontFp!("-1");
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/// G_GENERATOR_Y = 2
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/// Encoded in Montgomery form, so the value here is 2R mod p.
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pub const G_GENERATOR_Y: Fq = MontFp!("2");
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